基于运行速度的立交线形设计方法研究

发布时间：2018-05-15 06:37

本文选题：运行速度 + 线形评价　；参考：《长安大学》2015年硕士论文

【摘要】：目前,我国的公路及立交线形的设计方法基本上是基于设计速度。在设计时,设计者仅仅按照规范要求控制线形技术指标符合技术规范的标准,致使车辆在公路及立交上行驶时的速度与设计速度出现了不一致现象,容易诱发交通事故。因此,本文提出了利用运行速度来进行互通式立交主线及匝道线形设计的方法。本文首先对车辆在互通式立交上行驶特性进行分析,将车辆在立交匝道上行驶过程划分为三段:减速段、匀速段和加速段,并分析出车辆在这三段上的运行速度与其影响因素的关系,为模型的建立奠定理论基础。然后根据我国的交通条件,制定出相应的调查方法,对西安市三环线上四个立交相应特征点车辆的行驶速度进行调查,通过实地调查,获取相应数据,为模型的建立奠定数据基础。以调查数据为基础,绘制出车辆在主线及匝道上的运行速度趋势图,分析各段的运行速度与相应的影响因素之间的相关关系,定性得出主线运行速度模型;利用数学统计软件SAS回归分析出代表车型在匝道不同段落上的运行速度模型,进行显著性分析,验证了回归模型的拟合程度及合理性。最后,介绍了应用运行速度对互通式立交主线及匝道的速度协调性评价标准及评价步骤,并结合工程实例,利用建立的互通式立交主线及匝道运行速度模型,综合分析模型的应用情况。
[Abstract]:At present, the design method of highway and interchange line in our country is based on design speed. In the design, the designers only control the linear technical specifications according to the specifications, which makes the speed of the vehicle on the highway and the interchange appear inconsistent with the design speed, and it is easy to induce traffic accidents. Therefore, this paper puts forward a method to design the main line and ramp line of interchange by using running speed. In this paper, first of all, the characteristics of the vehicle on the interchange are analyzed, and the driving process of the vehicle on the ramp is divided into three sections: deceleration section, uniform speed section and acceleration section. The relationship between the speed of the vehicle in the three sections and its influencing factors is analyzed, which lays a theoretical foundation for the establishment of the model. Then according to the traffic conditions of our country, the corresponding investigation method is worked out to investigate the driving speed of the vehicles at the corresponding characteristic points of the four interchanges on the third Ring Line of Xi'an. Through field investigation, the corresponding data are obtained. Establish the data base for the establishment of the model. Based on the survey data, this paper draws the trend chart of the running speed of the vehicle on the main line and ramp, analyzes the correlation between the running speed of each section and the corresponding influencing factors, and obtains the main line speed model qualitatively. By using the mathematical statistical software SAS regression analysis, the running speed model of the representative vehicle on different sections of the ramp is obtained, and the significance analysis is carried out, which verifies the fitting degree and rationality of the regression model. Finally, the paper introduces the evaluation criteria and steps of the speed coordination of the main line and ramp of the interchange by using the running speed, and combining with the engineering example, using the established speed model of the main line and the ramp of the interchange. The application of comprehensive analysis model.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U412.352

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